Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for producing lactic acid from bagasse

A technology of bagasse and lactic acid, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of high cost, aggravation of food and feed resources, and consumption of large grains, and achieve low cellulose loss and increase Biotransformation efficiency, the effect of reducing invalid adsorption

Inactive Publication Date: 2015-06-10
BEIJING FORESTRY UNIVERSITY
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main raw material used in traditional lactic acid fermentation is starch, the cost is high, and large-scale industrial production will consume a large amount of grain, which will aggravate the tension of grain and feed resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing lactic acid from bagasse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present embodiment provides a kind of method of producing lactic acid by bagasse, specifically:

[0024] The bagasse is pulverized by adding water to a disk mill, and sieved by an industrial vibrating sieve through a 20-mesh sieve. The pretreatment process is carried out in a pressure-resistant reactor, the mass percentage of bagasse is 10% (w / v), and the reaction is heated at 145° C. for 3 hours. Ethanol: water: 1:1 (V / V), green liquid (sodium carbonate is 75.2g / L, sodium hydroxide is 23.0g / L, iron ion is 1.14g / L, calcium ion is 0.39g / L, pH13. 3. Taken from a paper mill in Shandong) dosage: 1.5ml / (g substrate). Filtration is performed after pretreatment, and the filtrate is separated by acid precipitation to separate lignin, then concentrated to recover ethanol, and the residue is burned to recover heat energy and green liquor. The solid filter residue directly enters the synchronous saccharification and fermentation to produce lactic acid. Add 50 g of pretreate...

Embodiment 2

[0027] The present embodiment provides a kind of method of producing lactic acid by bagasse, specifically:

[0028] The bagasse is pulverized by adding water to a disk mill, and sieved by an industrial vibrating sieve through a 20-mesh sieve. The pretreatment process is carried out in a pressure-resistant reactor, the mass percentage of bagasse is 10% (w / v), and the reaction is heated at 140° C. for 2 hours. Ethanol: water: 1:1 (V / V), the amount of green solution: 0.5ml / (g substrate). Filtration is performed after pretreatment, and the filtrate is separated by acid precipitation to separate lignin, then concentrated to recover ethanol, and the residue is burned to recover heat energy and green liquor. The solid filter residue directly enters the synchronous saccharification and fermentation to produce lactic acid. Add 50 g of pretreated bagasse and 5 g of tea seed cake to 1 liter of fermentation system, and use 10% NaOH or 10% H 2 SO 4 The solution adjusted the pH of the s...

Embodiment 3

[0030] The present embodiment provides a kind of method of producing lactic acid by bagasse, specifically:

[0031] The bagasse is pulverized by adding water to a disk mill, and sieved by an industrial vibrating sieve through a 20-mesh sieve. The pretreatment process is carried out in a pressure-resistant reactor, the mass percentage of bagasse is 10% (w / v), and the reaction is heated at 140° C. for 4 hours. Ethanol: water ratio: 1:1 (V / V), green solution dosage: 1.0ml / (g substrate). Filtration is performed after pretreatment, and the filtrate is separated by acid precipitation to separate lignin, then concentrated to recover ethanol, and the residue is burned to recover heat energy and green liquor. The solid filter residue directly enters the synchronous saccharification and fermentation to produce lactic acid. Add 50 g of pretreated bagasse and 5 g of tea seed cake to 1 liter of fermentation system, and use 10% NaOH or 10% H 2 SO 4 The solution adjusted the pH of the sy...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for producing lactic acid from bagasse. The method comprises the following steps: grinding and filtering bagasse: adding water to the bagasse, carrying out wet grinding on the bagasse by virtue of a disc mill and sieving the bagasse; carryin gout green liquor-ethanol coupling pretreatment: carrying out a pretreatment course in a pressure-proof reaction kettle, adding the ground bagasse to the reactor and adding a green liquor, wherein heating temperature is 140-145 DEG C and reaction duration is 2-4h; filtering after the pretreatment so as to obtain solid residues; carrying out synchronous saccharification and fermentation: adding cellulase and lactobacillus strain to the solid residues obtained from pretreatment in a mode of taking the solid residues as a fermentation substrate, and reacting at 45 DEG C at pH value of 4.8-5.0 for 72-96h so as to produce the lactic acid. The method for producing the lactic acid from bagasse disclosed by the invention is high in conversion rate of hydrolyzing cellulase into cellulose and semi-cellulose; and the utilization rate of bagasse resource component is high and production cost is low.

Description

technical field [0001] The invention relates to the technical field of biochemistry and chemical engineering, in particular to a method for producing lactic acid from bagasse. Background technique [0002] Bagasse is a by-product of the sugar industry. It is the fibrous residue left after extracting sugar juice by different methods. Its composition is mainly cellulose (43.6%), hemicellulose (21.5%) and lignin (26.4%). , contains a small amount of protein, less starch and soluble sugar. Compared with other fiber raw materials, bagasse has the characteristics of concentrated sources, large output, simple collection, convenient transportation, high total cellulose content, uniform properties, etc., and its physical and chemical composition are suitable for use as raw materials for biotransformation. Bagasse raw material is rich in cellulose, hemicellulose and lignin. When using cellulase to hydrolyze monosaccharides, the cellulase must be contacted and adsorbed on the cellulos...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/56C12P39/00C12R1/46C12R1/07C12R1/225
CPCC12P7/56C12P39/00
Inventor 蒋建新于海龙王永淼雷福厚刘祖广游艳芝孙达峰朱莉伟
Owner BEIJING FORESTRY UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com